Kevin Systrom, Instagram’s co-founder and CEO, credits Snapchat for developing the stories format. But he says it was always bound to surface in other apps. "My thesis is a story is a slideshow format," Systrom said in an interview with The Verge. "Just like when Facebook invented the [News] Feed, and every social product was like, ‘That’s an innovation, how do we adapt that to our network?’ You’re going to see stories pop up in other networks over time, because it’s one of the best ways to show visual information in chronological order."